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MAN - BBR3 - REV: Original | C. System Overview
13
Accessories
Specimen Molds
A specimen mold is used to create specimens. Each mold consists of five aluminum bars of various sizes, three
mylar strips, and two holding rings. Five of these molds are supplied with the BBR3.
Confidence Beam
The confidence beam is a thin stainless steel beam of a known stiffness. This beam is placed on the specimen
supports of the load frame during the confidence check.
Non-Compliant Beams
The BBR3 comes with a Non-Compliant Beam and a Crack Sealant Non-Compliant Beam. The Non-Compliant
Beam is a length of stainless steel that has the same dimensions as a specimen. This beam is placed on the
specimen supports when verifying and calibrating the load cell and when performing the compliance test. The
Crack Sealant Non-Compliant Beam is the thicker of the two beams, and is used only for Crack Sealant tests.
Step Disk
The step disk is used during LVDT standardization and verifi
-
cation. It has five positions containing high precision balls. The
calibration positions include a zero gaging and four subse-
quent steps which decrease in increments of 1, 3, 5, and 6
mm. These steps are labeled on the disk using the letters A
(1 mm), B (3mm), C (5mm), and D (6mm). This provides the
6mm test range required by both ASTM and AASHTO Specifi
-
cations.
Load Cell Calibration Weights
Four 100 gram and two 2 gram load cell calibration weights are supplied with the BBR3. These weights are
placed on the load frame weight pan during load cell verification. The weights are also used to calibrate the
load cell and ensure system compliance.
Figure C.8 - BBR3 Step Disk